0.6.44

## What's Changed
* Use default context window size if none found by @wsargent in https://github.com/letta-ai/letta/pull/2499
* Use logging in bedrock by @wsargent in https://github.com/letta-ai/letta/pull/2502
* Add comments to the MCP example by @wsargent in https://github.com/letta-ai/letta/pull/2507
* Fix the credentials check to use bool by @wsargent in https://github.com/letta-ai/letta/pull/2501
* [FIX] Update example.py to reflect breaking API changes by @kyuds in https://github.com/letta-ai/letta/pull/2471
* docs(contrib): replace poetry shell with env activate for 2.0 by @kk-src in https://github.com/letta-ai/letta/pull/2381
* fix: Update app.py - setup_auth_router()  by @JindrichSima in https://github.com/letta-ai/letta/pull/2369
* fix: remove the missing arg `name` from create_tool in client.py by @azinasg in https://github.com/letta-ai/letta/pull/2428
* Update example.py with docstring note about `letta_client` by @CShorten in https://github.com/letta-ai/letta/pull/2462
* fix: Use right tag for debug messages by @kk-src in https://github.com/letta-ai/letta/pull/2441
* chore: Use AzureOpenAI calls for model listings and completions by @kk-src in https://github.com/letta-ai/letta/pull/2443
* refactor(azure-embedding): Removed unnecessary and commented Azure embedding code by @kk-src in https://github.com/letta-ai/letta/pull/2461
* [FIX] Respect configured embedding model by @aluferraz in https://github.com/letta-ai/letta/pull/2464
* [Improvements] Use single query for Block Manager get_all_blocks_by_ids by @kyuds in https://github.com/letta-ai/letta/pull/2485
* Fix optimistic json parser strict mode by @lemorage in https://github.com/letta-ai/letta/pull/2506
* chore: Various feature requests and bug fixes by @mattzh72 in https://github.com/letta-ai/letta/pull/2509
* Fix: Rename reserved state argument inside tool to latest sdk by @stocyr in https://github.com/letta-ai/letta/pull/2513
* chore: release 0.6.44 by @sarahwooders in https://github.com/letta-ai/letta/pull/2519

## New Contributors
* @kyuds made their first contribution in https://github.com/letta-ai/letta/pull/2471
* @JindrichSima made their first contribution in https://github.com/letta-ai/letta/pull/2369
* @azinasg made their first contribution in https://github.com/letta-ai/letta/pull/2428
* @CShorten made their first contribution in https://github.com/letta-ai/letta/pull/2462
* @aluferraz made their first contribution in https://github.com/letta-ai/letta/pull/2464
* @stocyr made their first contribution in https://github.com/letta-ai/letta/pull/2513

**Full Changelog**: https://github.com/letta-ai/letta/compare/0.6.43...0.6.44